10-102918527-G-A

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 3P and 3B. PM2PP2BP4_ModerateBS1_Supporting

The NM_017649.5(CNNM2):c.47G>A(p.Gly16Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000161 in 1,604,416 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00016 ( 0 hom. )

Consequence

CNNM2
NM_017649.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 1.87

Variant links:

Genes affected

CNNM2 (HGNC:103): (cyclin and CBS domain divalent metal cation transport mediator 2) This gene encodes a member of the ancient conserved domain containing protein family. Members of this protein family contain a cyclin box motif and have structural similarity to the cyclins. The encoded protein may play an important role in magnesium homeostasis by mediating the epithelial transport and renal reabsorption of Mg2+. Mutations in this gene are associated with renal hypomagnesemia. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2011]

CNNM2 links:

ENSG00000286575 (HGNC:):

ENSG00000286575 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the CNNM2 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 16 curated pathogenic missense variants (we use a threshold of 10). The gene has 10 curated benign missense variants. Gene score misZ: 4.4105 (above the threshold of 3.09). Trascript score misZ: 5.0056 (above the threshold of 3.09). GenCC associations: The gene is linked to hypomagnesemia, seizures, and intellectual disability 1, familial primary hypomagnesemia with normocalciuria and normocalcemia, renal hypomagnesemia 6.

BP4

Computational evidence support a benign effect (MetaRNN=0.17726523).

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000144 (22/152322) while in subpopulation NFE AF= 0.000279 (19/68022). AF 95% confidence interval is 0.000182. There are 0 homozygotes in gnomad4. There are 10 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CNNM2	NM_017649.5 link	c.47G>A	p.Gly16Glu	missense_variant	Exon 1 of 8	ENST00000369878.9	NP_060119.3	Q9H8M5-1
CNNM2	NM_199076.3 link	c.47G>A	p.Gly16Glu	missense_variant	Exon 1 of 7		NP_951058.1	Q9H8M5-2
CNNM2	NM_199077.3 link	c.47G>A	p.Gly16Glu	missense_variant	Exon 1 of 2		NP_951059.1	Q9H8M5-3
LOC107984265	NR_160733.1 link	n.-192C>T		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CNNM2	ENST00000369878.9 link	c.47G>A	p.Gly16Glu	missense_variant	Exon 1 of 8	1	NM_017649.5	ENSP00000358894.3	Q9H8M5-1
CNNM2	ENST00000369875.3 link	c.47G>A	p.Gly16Glu	missense_variant	Exon 1 of 2	1		ENSP00000358891.3	Q9H8M5-3
CNNM2	ENST00000433628.2 link	c.47G>A	p.Gly16Glu	missense_variant	Exon 1 of 7	2		ENSP00000392875.2	Q9H8M5-2
ENSG00000286575	ENST00000652934.1 link	n.-192C>T		upstream_gene_variant

Frequencies

GnomAD3 genomes

AF:

0.000145

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000279

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000574

AC:

AN:

226442

Hom.:

AF XY:

0.0000478

AC XY:

AN XY:

125436

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000301

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000109

Gnomad OTH exome

AF:

0.000184

GnomAD4 exome

AF:

0.000163

AC:

237

AN:

1452094

Hom.:

Cov.:

AF XY:

0.000151

AC XY:

109

AN XY:

722312

show subpopulations

Gnomad4 AFR exome

AF:

0.0000309

Gnomad4 AMR exome

AF:

0.0000906

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000200

Gnomad4 OTH exome

AF:

0.000167

GnomAD4 genome

AF:

0.000144

AC:

AN:

152322

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000279

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000243

Hom.:

Bravo

AF:

0.000113

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000120

AC:

ExAC

AF:

0.0000340

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:4

Aug 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

CNNM2: PM2:Supporting, PP2 -

Jan 13, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 16 of the CNNM2 protein (p.Gly16Glu). This variant is present in population databases (rs370580602, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with CNNM2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1430577). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Aug 04, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Nov 14, 2019

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Renal hypomagnesemia 6;C4225333:Hypomagnesemia, seizures, and intellectual disability 1

Uncertain:1

Dec 13, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.025

BayesDel_noAF

Uncertain

-0.060

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.021

T;.;.

Eigen

Benign

-0.11

Eigen_PC

Benign

0.081

FATHMM_MKL

Benign

0.034

LIST_S2

Benign

0.78

T;T;T

M_CAP

Pathogenic

0.99

MetaRNN

Benign

0.18

T;T;T

MetaSVM

Benign

-0.65

MutationAssessor

Benign

0.0

N;N;N

PrimateAI

Pathogenic

0.87

PROVEAN

Benign

-1.0

N;N;N

REVEL

Uncertain

0.29

Sift

Uncertain

0.0030

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

0.0010

B;.;B

Vest4

0.14

MVP

0.15

ClinPred

0.22

GERP RS

4.9

Varity_R

0.42

gMVP

0.54

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over